Vulnerability · Published Jun 26, 2026 · Assigned by certcc
CVE-2026-0685Server side template inject (SSTI) in Edgewall Genshi Template Engine
Critical 9.8
In plain English
A critical-severity security flaw in Genshi from Edgewall *Genshi*. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.9%top 39.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Server side template inject (SSTI) in the expression evaluation component in Genshi Template Engine version 0.7.9 allows a remote attacker to achieve remote code execution (RCE) via crafted template expressions.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | genshi | no fix listed | UBUNTU-CVE-2026-0685 |
| Ubuntu:24.04:LTS | genshi | no fix listed | UBUNTU-CVE-2026-0685 |
| Ubuntu:25.10 | genshi | no fix listed | UBUNTU-CVE-2026-0685 |
| Ubuntu:26.04:LTS | genshi | no fix listed | UBUNTU-CVE-2026-0685 |
| Ubuntu:26.10 | genshi | no fix listed | UBUNTU-CVE-2026-0685 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Edgewall *Genshi* | Genshi | 0 – through 0.7.9 |